What is a quite exhaust for a 99 c 5?

 

If you want something that is just slightly louder than the stock exhaust, the Z06 titanium cat-back may be your best choice. You can find them used for about $500. Next on the list is the Corsa Touring cat-back. This'll be a bit heavier and will have a different sound, both at idle and at Wide Open Throttle.

You can hear quite a few cat-backs at http://www.thx2.net/exhaust.htm

Dave

 

just had a Corsa x-pipe and touring exhaust installed on a '04 LS1. very please with the sound. no change at idle, nice rumble with small crackle on go and no cockpit noise at highway speeds.